function KenBurnsFader( img, windowSize )
{
  this.img = img;
  this.windowSize = windowSize;
}

KenBurnsFader.prototype.apply = function( percent )
{
  var opacity = 100;
	
	  if ( percent >= ( 100 - this.windowSize ) )
    	opacity = ( ( 100 - percent ) / this.windowSize ) * 100;
     else if ( percent <= this.windowSize )
	    opacity = ( percent / this.windowSize ) * 100;
	//if ( percent >= ( 100 - this.windowSize ) )		
    //	opacity = ( ( 100 - percent ) / this.windowSize ) * 100;
   		
	 this.img.set_opacity( opacity );
}